Redux has been years in the making, and overhauls the game's single player campaign with a completely rewritten weather system, massive upgrades to textures and visual effects, and some gameplay tweaks for good measure. You can see the full list of changes here, but the best way to appreciate the mod is to watch the trailer below.

According to the mod’s creator Josh Romito, you need to be able to run the vanilla game at a decent frame rate in order to achieve optimal performance with the mod, and a frame drop of around 5-15 fps compared with the vanilla version is to be expected.

The mod is a 4GB download, although further texture updates will likely expand that to 6-7GB.